The Quarterly journal of the Geological Society of London . r cusp than is thecase in the lower molars. The two outer cusps show some tendencyto unite one with the other, the outer end of the transverse valleybeing much shallower than the inner, so that in an advanced stateof wear the surfaces of the two cusps would become cingulum is well developed on both the anterior and the posteriorfaces of the tooth ; it is also present at the inner end of the trans-verse valley and as faint irregular tubercles on the outer were three roots to this tooth, one at the antero-exter
The Quarterly journal of the Geological Society of London . r cusp than is thecase in the lower molars. The two outer cusps show some tendencyto unite one with the other, the outer end of the transverse valleybeing much shallower than the inner, so that in an advanced stateof wear the surfaces of the two cusps would become cingulum is well developed on both the anterior and the posteriorfaces of the tooth ; it is also present at the inner end of the trans-verse valley and as faint irregular tubercles on the outer were three roots to this tooth, one at the antero-externalangle, a second occupying the anterior portion of the inner side; 1 Proc. Zool. Soc. 1911, p. 943. 166 DR. C. W. ANDREWS OX LOWER MIOCENE [June 1914, while the third occupies the whole width of the posterior side ofthe tooth, and extends a little along the outer border. The dimensions (in centimetres) of this specimen are :— Length 49 Width 5-4 Numerous fragments of the lower tusk of Dinotlierium were col- lected : these show no traces of the Fig. A=Tibia of a Tetrabelodont seen from the = Distal end of a tibia of a large Anthracothere seen from the = The same, distal articular surface. = cnemial crest.[All the figures are a fifth of the natural size.] engine-turning characteristic• of the ivory of the uppertusks of Eleplias, butindicate that the dentinewas composed of con-centric lamellae, whichtend to split apart as dis-integration takes trace of enamel hasbeen observed on anyof the fragments. Onespecimen of the tip ofthe tusk shows that itwas strongly compressedat the end, which formsa sharp point. The above - describedspecimens are from Bed31. In Bed 22, a Probo-scidean tibia (fig. 1, A)was collected, the bonebeing well preserved and,complete, except thatthe distal epiphysisis missing. It is vervsimilar in structure tothe tibia of an Africanelephant, with which itwas compared, differingonly in some minor fea-tures. Thus the pit forth
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